'use strict'
const path = require('path')
const pkg = require('./package.json')

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = pkg.name || 'vue-element-admin' // page title
const port = 9527 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: './',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development' ? 'error' : false,
  productionSourceMap: false,
  devServer: {
    port: port, //项目运行的端口号
    open: true, //配置自动启动浏览器
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      [process.env.VUE_APP_BASE_API]: {
        target: `http://152.136.13.167`,
        changeOrigin: true, //是否跨域
        // ecusre: false, // 如果是https接口，需要配置这个参数
        // logLevel: 'debug',
        pathRewrite: {
          ['^']: ''
        }
      },
      '/user|/role|/group|/socket.io|/linedata': {
        target: process.env.VUE_APP_BASE_IP, // 数据接口
        changeOrigin: true, // 跨域
        secure: false,
        logLevel: 'debug',
        pathRewrite: {
          ['^']: '',
          ['^' + '/mock']: ''
        }
      }
    },
    after(app) {
      require('@babel/register')
      const bodyParser = require('body-parser')

      // parse app.body
      // http://expressjs.com/en/4x/api.html#req.body
      app.use(bodyParser.json())
      app.use(
        bodyParser.urlencoded({
          extended: true
        })
      )

      const { default: mocks } = require('./mock')
      for (const mock of mocks) {
        app[mock.type](mock.url, mock.response)
      }
    }
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config.when(process.env.NODE_ENV === 'development', config => config.devtool('cheap-source-map'))

    config.when(process.env.NODE_ENV !== 'development', config => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [
          {
            // `runtime` must same as runtimeChunk name. default is `runtime`
            inline: /runtime\..*\.js$/
          }
        ])
        .end()
      config.optimization.splitChunks({
        chunks: 'all',
        minSize: 10000, // 提取出的新chunk在两次压缩(打包压缩和服务器压缩)之前要大于30kb
        maxSize: 20000, // 提取出的新chunk在两次压缩之前要小于多少kb，默认为0，即不做限制
        minChunks: 1, // 被提取的chunk最少需要被多少chunks共同引入
        maxAsyncRequests: 5, // 最大按需载入chunks提取数
        maxInitialRequests: 3, // 最大初始同步chunks提取数
        automaticNameDelimiter: '~', // 默认的命名规则（使用~进行连接）
        name: true,
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]element-ui[\\/]/
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      config.optimization.runtimeChunk('single')
    })
  }
}
